A popular college student accepts a social outcast's online friend request. After the new "friend" becomes too obsessive, the main character unfriends her, leading the outcast to commit suicide. Soon, her Facebook profile becomes haunted by a mysterious, demonic presence that begins to kill off her real-life friends one by one. As her online friend count plummets, the frightened student must race to uncover the mystery behind the curse before she is left completely alone.